You can easily delete a notebook in OneNote when you no longer need it. If you might want the information in the notebook again in the future, you can remove it from OneNote without permanently ...
OneNote automatically saves your work through its notebook syncing feature. To use this Microsoft note-taking app feature, you have to enable the "Sync automatically whenever there are changes" option ...
Microsoft will add automatic local backups to OneNote on iOS in March 2026, improving recovery but raising new data security ...